Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A transmit diversity method, comprising: receiving, by a network node configured with N antennas, a configuration command, wherein N is an even number greater than or equal to 4; according to the configuration command, configuring antenna ports of M antennas as a first antenna port and configuring antenna ports of the remaining N-M antennas as a second antenna port, wherein M is a number equal to N divided by 2; multiplying an information symbol to be transmitted through the first antenna port by a first beamforming vector to obtain a first weighing matrix, wherein the first beamforming vector is an M-dimensional column vector; multiplying an information symbol to be transmitted through the second antenna port by a second beamforming vector to obtain a second weighing matrix, wherein the second beamforming vector is an M-dimensional column vector; transmitting, by each antenna mapping to the first antenna port, an element in the first weighing matrix to a user equipment (UE) on a predefined subcarrier of the antenna, wherein each antenna mapping to the first antenna port transmits an element from a fixed row in the first weighing matrix and the elements transmitted by different antennas are from different fixed rows in the first weighing matrix; and transmitting, by each antenna mapping to the second antenna port, an element in the second weighing matrix to the user equipment UE on a predefined subcarrier of the antenna, wherein each antenna mapping to the second antenna port transmits an element from a fixed row in the second weighing matrix and the elements transmitted on different antennas are from different fixed rows in the second weighing matrix.
A transmit diversity method for a network node with N antennas (N is an even number >= 4) involves receiving a configuration command. Based on this command, M antennas (M = N/2) are configured as a first antenna port, and the remaining N-M antennas as a second antenna port. An information symbol for the first antenna port is multiplied by a first beamforming vector to create a first weighing matrix. Similarly, an information symbol for the second antenna port is multiplied by a second beamforming vector to create a second weighing matrix. Each antenna assigned to the first antenna port transmits a row from the first weighing matrix to a user equipment (UE) on a specific subcarrier. The same process occurs for the second antenna port, using the second weighing matrix. Each antenna on its assigned port transmits a different fixed row of its weighting matrix.
2. The method according to claim 1 , wherein: the first antenna port is an antenna port 0; the second antenna port is an antenna port 1; the information symbol to be transmitted through the first antenna port is defined by space-frequency block code (SFBC); and the information symbol to be transmitted through the second antenna port is defined by the SFBC.
The transmit diversity method described where a network node with N antennas (N is an even number >= 4) receives a configuration command and configures M antennas (M = N/2) as a first antenna port, and the remaining N-M antennas as a second antenna port, using beamforming vectors and weighting matrices to transmit information symbols through each port to a UE on specific subcarriers, is further specified. In this version the first antenna port is antenna port 0, and the second antenna port is antenna port 1. The information symbols transmitted through both antenna ports use space-frequency block code (SFBC).
3. The method according to claim 1 , wherein: the first beamforming vector is orthogonal to the second beamforming vector.
The transmit diversity method described where a network node with N antennas (N is an even number >= 4) receives a configuration command and configures M antennas (M = N/2) as a first antenna port, and the remaining N-M antennas as a second antenna port, using beamforming vectors and weighting matrices to transmit information symbols through each port to a UE on specific subcarriers, is further specified. In this version, the first beamforming vector and the second beamforming vector are orthogonal to each other.
4. A transmit diversity method, comprising: receiving, by a network node in a first network node group, a first configuration command; configuring an antenna port of a local antenna as a first antenna port according to the first configuration command; transmitting an information symbol to be transmitted through the first antenna port to a user equipment (UE) on a predefined subcarrier; receiving, by a network node in a second network node group, a second configuration command; configuring an antenna port of a local antenna as a second antenna port according to the second configuration command; and transmitting an information symbol to be transmitted through the second antenna port to the UE on a predefined subcarrier; wherein the network nodes in the first network node group and the network nodes in the second network node group are located in a single cell, and wherein one antenna is configured in each of the first network node group and the second network node group.
A transmit diversity method involves a network node in a first network node group receiving a first configuration command and configuring its local antenna as a first antenna port. This node transmits an information symbol on a predefined subcarrier to a user equipment (UE). Simultaneously, a network node in a second network node group receives a second configuration command and configures its local antenna as a second antenna port. This node transmits an information symbol on a predefined subcarrier to the same UE. Both network node groups are located in the same cell, with each node group having only one antenna.
5. The method according to claim 4 , wherein the first antenna port is an antenna port 0; wherein the second antenna port is an antenna port 1; wherein the information symbol to be transmitted through the first antenna port to the UE on the predefined subcarrier is defined by space-frequency block code (SFBC); and wherein the information symbol to be transmitted through the second antenna port to the UE on the predefined subcarrier is defined by the SFBC.
The transmit diversity method where network nodes in two groups, each with one antenna, configure their antennas as different ports and transmit information to a UE, the first antenna port being configured by first antenna port and the second port configured by the second antenna port, is further specified. Here, the first antenna port is antenna port 0, and the second antenna port is antenna port 1. The information symbols transmitted from both ports to the UE using the predefined subcarrier are defined by space-frequency block code (SFBC).
6. The method according to claim 4 , wherein: a difference between a number of network nodes comprised in the first network node group and a number of network nodes comprised in the second network node group is less than a predefined threshold.
The transmit diversity method where network nodes in two groups, each with one antenna, configure their antennas as different ports and transmit information to a UE, is further specified. In this version, the difference between the number of network nodes in the first group and the number of network nodes in the second group is less than a predefined threshold. This ensures a balanced contribution from each antenna port.
7. A network node, configured with N antennas, wherein N is an even number greater than or equal to 4, comprising: a receiving unit, adapted to receive a configuration command; a configuring unit, adapted to, according to the configuration command received by the receiving unit, configure antenna ports of M antennas as a first antenna port and to configure antenna ports of N-M antennas as a second antenna port, wherein M is a number equal to N divided by 2; a processing unit, adapted to multiply an information symbol to be transmitted through the first antenna port by a first beamforming vector to obtain a first weighing matrix and to multiply an information symbol to be transmitted through the second antenna port by a second beamforming vector to obtain a second weighing matrix, wherein both the first beamforming vector and the second beamforming vector are M-dimensional column vectors; M first transmitting units, each located on an antenna mapping to the first antenna port, wherein each of the first transmitting units adapted to transmit an element in the first weighing matrix obtained by the processing unit to a user equipment (UE) on a predefined subcarrier, wherein each first transmitting unit transmits an element from a fixed row in the first weighing matrix and the elements transmitted by first transmitting units on different antennas are from different rows in the first weighing matrix; and N-M second transmitting units, each located on an antenna mapping to the second antenna port, wherein each of the second transmitting units is adapted to transmit an element in the second weighing matrix obtained by the processing unit to the UE on the predefined subcarrier, wherein each second transmitting unit transmits an element from a fixed row in the first weighing matrix and the elements transmitted by the second transmitting units on different antennas are from different rows in the second weighing matrix.
A network node, configured with N antennas (N is an even number >= 4), includes a receiving unit for receiving a configuration command. A configuring unit then configures M antennas (M = N/2) as a first antenna port and N-M antennas as a second antenna port. A processing unit multiplies an information symbol for the first antenna port by a first beamforming vector to generate a first weighing matrix and multiplies an information symbol for the second antenna port by a second beamforming vector to generate a second weighting matrix. M first transmitting units, each on an antenna mapped to the first antenna port, transmit elements from fixed rows of the first weighting matrix to a user equipment (UE) on a predefined subcarrier, and N-M second transmitting units on antennas mapped to the second antenna port similarly transmit elements from fixed rows of the second weighing matrix.
8. The network node according to claim 7 , wherein: the configuring unit is adapted to configure the antenna ports of the M antennas as an antenna port 0 and to configure antenna ports of the remaining (N-M) antenna as an antenna port 1.
The network node with N antennas (N is an even number >= 4) that receives a configuration command and divides its antennas into two ports using beamforming, creating weighting matrices and transmitting elements from different rows to the UE, is further specified. In this case, the configuring unit assigns antenna port 0 to the M antennas configured as the first antenna port and antenna port 1 to the remaining N-M antennas.
9. A transmit diversity system, comprising: a first network node group; and a second network node group; wherein network nodes in the first network node group and the second network node group are located in a single cell, and wherein one antenna is configured on each of the network nodes in the first network node group and the second network node group; wherein a network node in the first network node group comprises: a first transceiving unit, adapted to receive a first configuration command; and a first processing unit, adapted to configure an antenna port of a local antenna as a first antenna port according to the first configuration command received by the first transceiving unit; wherein the first transceiving unit is further adapted to transmit an information symbol to be transmitted through the first antenna port to a user equipment (UE) on a predefined subcarrier; and a network node in the second network node group comprises: a second transceiving unit, adapted to receive a second configuration command; and a second processing unit, adapted to configure an antenna port of a local antenna as a second antenna port according to the second configuration command received by the second transceiving unit; wherein the second transceiving unit is further adapted to transmit an information symbol to be transmitted through the second antenna port to the UE on a predefined subcarrier.
A transmit diversity system includes a first network node group and a second network node group within a single cell, with each network node having one antenna. A node in the first group receives a first configuration command, and its processing unit configures its local antenna as a first antenna port. Its transceiving unit then transmits an information symbol to a user equipment (UE) on a predefined subcarrier. A node in the second group receives a second configuration command, and its processing unit configures its local antenna as a second antenna port. Its transceiving unit then transmits an information symbol to the UE on a predefined subcarrier.
10. The system according to claim 9 , wherein the first processing unit is adapted to configure the antenna port of the local antenna as an antenna port 0; and wherein the second processing unit is adapted to configure the antenna port of the local antenna as an antenna port 1.
The transmit diversity system comprising of two network node groups each with one antenna that configure local antennas to different ports and transmit signals to a UE, is further specified. The first processing unit configures its antenna as antenna port 0, and the second processing unit configures its antenna as antenna port 1.
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December 9, 2014
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